New Tanzania mine uncovers source of exceptional rubies
New Tanzania mine uncovers source of exceptional rubies. Published in InColor, 2008. Author(s): M.S. Krzemnicki, H.A. Haenni
New rubies from central Tanzania
New rubies from central Tanzania. Published in Gems & Gemology, 2008. Author(s): H.A. Haenni
Observations on treated ruby and sapphire
Observations on treated ruby and sapphire. Published in Taiwan Jewellery World Magazine, 2006. Author(s): H.A. Haenni
Rubine aus neuen Vorkommen in Madagaskar
Rubine aus neuen Vorkommen in Madagaskar. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2001. Author(s): H.A. Haenni, C.C. Milisenda, U. Henn
Beobachtungen an hitzebehandeltem Rubin mit künstlicher Rissheilung
Beobachtungen an hitzebehandeltem Rubin mit künstlicher Rissheilung. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2001. Author(s): H.A. Haenni
Element mapping of trapiche rubies
Element mapping of trapiche rubies. Published in Journal of Gemmology, 1999. Author(s): K. Schmetzer, Z. Beili, G. Yan, H.-J. Bernhardt, H.A. Haenni
Trapiche-Rubine
Trapiche-Rubine. Published in GZ, 1997. Author(s): K. Schmetzer, H.A. Haenni, H.-J. Bernhardt, D. Schwarz
How to identify Douros synthetic rubies
How to identify Douros synthetic rubies. Published in Jewellery News Asia, 1994. Author(s): H.A. Haenni, K. Schmetzer
A new synthetic ruby from Greece poses challenges for gemmologists
A new synthetic ruby from Greece poses challenges for gemmologists. Published in Rapaport Diamond Magazine, 1993. Author(s): H.A. Haenni
Rubine vom Burma-Typ aus der Gegend von Morogoro in Tansania
Rubine vom Burma-Typ aus der Gegend von Morogoro in Tansania. Published in GZ, 1991. Author(s): H.A. Haenni